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Hereditary spastic paraplegias (HSPs) represent a large and heterogeneous group of inherited disorders, presenting with a phenotype that is predominated by lower limb spasticity and weakness, often accompanied by pyramidal-tract signs and neurogenic bladder dysfunction. This phenotype is typically associated with the degeneration of the corticospinal tract that leads to the hallmark manifestations of the condition. The HSPs have been traditionally divided into pure and complicated forms.